Now this is really cool! Though as with all things wireless I'd worry about working and somehow the key fob getting interfered with and boom computer locks up or if a sensor thinks I'm moving the computer when it's really just an Earth quake or maybe even my cat jumping on the table and then the encryption key is deleted.

So I love the idea but not sure of the practicality. Those sensors has to essentially work perfectly at all times and I'm not convinced until it's released and reviewed.